hoffa. >> you don't impress me. i don't need $300 million and my brother elected -- >> reporter: many failed attempts to find him, tips had him buried in cement near the end zone of old giant stadium. they looked for blood stains on the floor boards of an old detroit home. hoffa's middle name was riddle and so is trying to pinpoint why his fate captivates so many people. >> he was a negotiator and powerful and combined that with his mysterious disappearance and the connection with the underworld and the mob. >> reporter: so, now, the question is, will police crack this case or will it remain an unsolved mystery? susan candiotti, cnn, roseville, michigan. >>> more engine trouble for the boeing 787 dreamliner. federal plane inspectors have found a second engine problem on another dreamliner. the aircraft had not yet flown when investigators identified the trouble. the national transportation safety board says it is investigating the problems. >>> all right, today, a portion of one of the busiest freeways in america cl